Mixing device



Feb. 21, 1956 w. E. HOLT 2,735,663

MIXING DEVICE Filed Sept. 5. 19,51

.ml- M FIGZ FIGBl INVENTOR ATTORN EY United States Patent O MIXING DEVICE william E. Holt, oakland, Calif.

Application September 5, 1951, Serial No. 245,173

Claims. (Cl. 259-75) This invention relates to machines for agitating and mixing paint and like fluent products, and more particularly, to an improved construction of machines of this type having a receptacle holder mounted on a main shaft oscillating about a vertical axis and arranged to hold a cylindrical receptacle with its axis arranged horizontally and transversely of the axis of oscillation.

The main object of my invention is the provision of a mixer of the character described having a light weight sturdy balanced construction relatively free of vibration in operation. A further and more specific object is the provision of a self-adjusting receptacle holder for such machines which is capable of accommodating a wide range of sizes of receptacles, easy to load and unload, and capable of holding the receptacle firmly in position while the contents thereof are thoroughly agitated and mixed.

The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which I have illustrated and described a preferred embodiment of my invention.

Of the drawings:

Fig. 1v is a sectional elevation, partly broken away and in section, of a paint mixer constructed in accordance with the invention;

Fig. 2 is a front view of the receptacle holder shown in Fig. l; and

Fig. 3 is a rear view of the receptacle holder.

The paint mixer illustrated has a two-part elongated chassis or housing open throughoutits bottom and having a three point support consisting of a rear suction cup 12 and a pair of front suction cups 14 symmetrically arranged relative thereto on the lower housing section 10b. A carrying handle 16 is secured to the upper housing section 10a. The housing sections are bolted together at spaced points, as indicated at 13.

Theinterior of the housing is divided into an open motor compartment 18 and a closed drive compartment 20, by a partition 22 integrally formed in the lower housing section. The compartment 18 contains an electric motor 24 pivotally mounted on the partition 22 by a pivot bolt 26 extending through and holding a U-shaped motor bracket 28 on vertically spaced lugs 30 formed on the partition. A tension spring 32 is positioned between the motor and partition. An electric power connection 34 and control switch 36 extend through the upper housing section and are connected to the motor 24 in the usual manner. A motor pulley 38 is keyed on the lower end of the motor shaft 40.

The drive pulley 38 is connected by a drive belt 42 to a larger pulley 44 keyed on a vertical rear main shaft 46, which is rotatably mounted in a bearing 48 in the upper housing section and a lower bearing 50 in an opening in Mice the partition 22. An oil seal 52 closes the partition opening about the shaft 46. The intermediate portion of the shaft 46 is enlarged to form a ily wheel 54. An eccentric 56 is formed on the shaft above the llywheel. A horizontal connecting rod 58 carried by the eccentric connects the eccentric to a pivot pin 60 carried by a pair of vertically spaced projecting lugs 62 integrally formed on a vertical front main shaft 64. The shaft 64 is oscillatably mounted in a lower bearing 66 in an opening in the partition 22 and an upper bearing 68 in the upper housing section. A counterweight 65 is formed on the shaft opposite the rod 58. A plug 70 closes the partition opening below the bearing 66. A llller plug 72 in the upper housing section permits the compartment 20 to be filled with lubricating oil to the desired level.

With the designed operation of the parts described, operation of the motor 24 causes the front main shaft 64 to be oscillated at a high rate about its vertical axis. The shaft 64 projects vertically through the upper housing section and a shaker body 74 is secured on its projecting end by a bolt 76 passing through both the shaft and a socket 78 formed on the underside of the shaker body. The shaker body has a front side 80 forwardly inclined from a narrow flat bottom 82. A rubber cushion 34 is secured to the bottom 82 for supporting the can or other receptacle 86 containing the liquid or other fluent material to be mixed. The rear side of the shaker body is formed by a rearwardly inclined surface 88 extending a substantial distance above the front side Si) and terminating in a pair of transversely spaced enlarged ears 90. The shaker body has raised end portions 92 to prevent the receptacle from slipping out of the shaker body.

The cans or other receptacles to be oscillated are preferably of cylindrical form to provide transverse end surfaces to deflect the contents and are held in the shaker f body by a spring pressed arcuately shaped flap clamp 94 mounted on the rear side of the shaker body. The clamp 94 has a pair of transversely spaced lugs 96 fitting into the space between the ears and pivotally mounted on an axis carried in the ears 96 at a level above the holder bottom substantially corresponding to the diameter of the largest size receptacle used. A spring 100 is symmetrically arranged along the upper surface of the clamp 94 with an intermediate portion extending around and' held by a knob 102 carried by a stud 104 on the forward portion of the clamp. The spring 16) has spaced intermediate portions 106 coiled around the axle 98 to force the portion therebetween downwardly and its opposite ends postioned in sockets 108 formed on the rear side of the shaker body. With this arrangement, the flap clamp is symmetrically pressed downwardly about the pivot axis formed by the axle 98.

The front end portion of the pivoted flap 94 has a rear wardly inclined section 110 and a forwardly inclined section 112, as shown in Fig. l, both of which are covered by a rubber cushion 114, so that different sections of the clamp will be brought into contact with different sized cans when the latter are positioned in the shaker body.

When the mixer is to be used, the tlap clamp is raised by the knob 162 against the pressure of the spring 10) to permit the insertion of a can or other receptacle in the shaker body. The clamp 94 can be held in the raised position indicated in dotted lines in Fig. 1 to facilitate the positioning and removal of receptacles, by means of a transversely slidable headed stop member 116 positioned in one of the ears 90 and adapted to be moved into the arcuate path of movement of the clamp. The stop is normally held in a retracted position by a spring 118 between the ear 90 and a knob 120 on the outer end of the stop member. With this arrangement the llap clamp can be raised to its upper position and the stop quickly slid into its clamp obstructing position to hold the clamp while the receptacle is being handled.

While in accordance with the provisions of the statutes I have illustrated and described herein the best form of the invention now known to me, those skilled in the art will understand that changes, may be made in the form of apparatus disclosed without departing from the spirit of the invention covered by the claims, and that certain features of the invention may sometimes be used to advantage without a corresponding use of other features.

I claim:

1. A mixing device comprising a housing enclosing an electric motor vertically mounted therein,` a rear vertical drive shaft laterally spaced from and operatively connected to said motor, an eccentric on said shaft, a Vfront vertical drive shaft projecting through said housing, a connecting rod on said eccentric pivotally connected to said front drive shaft and arranged to oscillate said shaft about its vertical axis, means forming a lubricating oil compartment in said housing enclosing said eccentric, connecting rod, and the lower portion of said front drive shaft, and a receptacle holder mounted on said front d rive shaft externally of said housing and arranged to receive a horizontally positioned receptacle.

2. A mixing device comprising a housing enclosing an electric motor vertically mounted therein, a rear vertical drive shaft laterally spaced from and operatively connected to said motor, an eccentric on said shaft, a front vertical drive shaft projecting through said housing, a connnecting rod on said eccentric pivotally connected to said Vfront drive shaft and arranged to oscillate said shaft about its vertical axis, a receptacle holder mounted on said front drive shaft externally of said housing and arranged to receive a horizontally positioned cylindrical receptacle, a receptacle clamp pivotally mounted on said holder, and means for resiliently pressing said clamp downwardly against the curved surface of said receptacle.

3. A mixing device comprising a housing enclosing an electric motor vertically mounted therein, a rear Vertical drive, Shaft laterally spaced from and operatively connected to said motor, an eccentric on said shaft, a front vertical drive shaft projecting through said housing, a connecting rod on said eccentric pivotally connected to said front drive shaft and arranged to oscillate said shaft about its vertical axis, a receptacle holder mounted on said front drive shaft externally of said housing and having oppositely inclined side portions arranged to receive a horizontally positioned cylindrical receptacle therebetween, a receptacle clamp pivotally mounted on one of said side portions, and means for resiliently pressing said clamp downwardly against the curved surface of said receptacle.

4. A mixing device comprising a housing enclosing an electric motor vertically mounted therein, a rear vertical drive shaft laterally spaced from and operatively connected to said motor, an eccentric on said shaft, a front vertical drive shaft projecting through said housing, a connecting rod on said eccentric pivotally connected to said front drive shaft and arranged to oscillate said shaft about its vertical axis, a receptacle holder mounted on said front drive shaft externally of said housing and having oppositely inclined side portions arranged to receive a horizontally positioned cylindrical receptacle therebetween, a receptacle clamp pivotally mounted on one of said side portions, means for resiliently pressing said clamp downwardly against the curved surface of said receptacle, and stop means on said receptacle holder movable into the arcuate path of movement of said clamp.

5. A mixing device comprising a housing having an open compartment enclosing an electric motor vertically mounted therein, and a closed lubricating oil compartment containing a rear vertical drive shaft having its lower end projecting outside said closed compartment and ,operatively connected to said motor, an eccentric on said shaft, a front vertical drive shaft in said closed ompartment, a connecting rod on said eccentric pivotally connected to said front drive shaft and arranged to oscillate said shaft about its vertical axis, a receptacle holder mounted on said front drive shaft externally of said closed compartment and having oppositely inclined side portions arranged to receive a horizontally positioned cylindrical receptacle therebetween, a receptacle clamp pivotally mounted on one of said side portions, and means for resiliently pressing said clamp downwardly against the curved surface of said receptacle.

References Cited inthe file of this patent UNITED STATES PATENTS 768,956 Smithley Aug. 30, 1904 985,040 Lilienthal Feb. 21, 1911 1,417,219 Warren May 23, 1922 1,691,155 Howell Nov. 13, 1928 1,997,400 Wysocki Apr. 9, 1935 2,002,323 Kurz May 21, 1935 2,022,526 Schletz Nov. 26,1935 

